Highest salary at Oak Lawn Sd 229 in year 2017 was $123,648. Number of employees at Oak Lawn Sd 229 in year 2017 was 83. Average annual salary was $35,948 and median salary was $24,849. Oak Lawn Sd 229 average salary is 23 percent lower than USA average and median salary is 43 percent lower than USA median salary. From 2016 to 2017, the average salary of employees at this employer increased 2.5 percent.